/* Top level stuff for GDB, the GNU debugger.
- Copyright (C) 1999-2014 Free Software Foundation, Inc.
+ Copyright (C) 1999-2016 Free Software Foundation, Inc.
Written by Elena Zannoni <ezannoni@cygnus.com> of Cygnus Solutions.
#include "event-top.h"
#include "interps.h"
#include <signal.h>
-#include "exceptions.h"
#include "cli/cli-script.h" /* for reset_command_nest_depth */
#include "main.h"
#include "gdbthread.h"
read commands from. */
int input_fd;
+/* Used by the stdin event handler to compensate for missed stdin events.
+ Setting this to a non-zero value inside an stdin callback makes the callback
+ run again. */
+int call_stdin_event_handler_again_p;
+
/* Signal handling variables. */
/* Each of these is a pointer to a function that the event loop will
invoke if the corresponding signal has received. The real signal
else
{
/* Turn off editing by using gdb_readline2. */
- rl_callback_handler_remove ();
+ gdb_rl_callback_handler_remove ();
call_readline = gdb_readline2;
/* Set up the command handler as well, in case we are called as
}
}
+/* The functions below are wrappers for rl_callback_handler_remove and
+ rl_callback_handler_install that keep track of whether the callback
+ handler is installed in readline. This is necessary because after
+ handling a target event of a background execution command, we may
+ need to reinstall the callback handler if it was removed due to a
+ secondary prompt. See gdb_readline_wrapper_line. We don't
+ unconditionally install the handler for every target event because
+ that also clears the line buffer, thus installing it while the user
+ is typing would lose input. */
+
+/* Whether we've registered a callback handler with readline. */
+static int callback_handler_installed;
+
+/* See event-top.h, and above. */
+
+void
+gdb_rl_callback_handler_remove (void)
+{
+ rl_callback_handler_remove ();
+ callback_handler_installed = 0;
+}
+
+/* See event-top.h, and above. Note this wrapper doesn't have an
+ actual callback parameter because we always install
+ INPUT_HANDLER. */
+
+void
+gdb_rl_callback_handler_install (const char *prompt)
+{
+ /* Calling rl_callback_handler_install resets readline's input
+ buffer. Calling this when we were already processing input
+ therefore loses input. */
+ gdb_assert (!callback_handler_installed);
+
+ rl_callback_handler_install (prompt, input_handler);
+ callback_handler_installed = 1;
+}
+
+/* See event-top.h, and above. */
+
+void
+gdb_rl_callback_handler_reinstall (void)
+{
+ if (!callback_handler_installed)
+ {
+ /* Passing NULL as prompt argument tells readline to not display
+ a prompt. */
+ gdb_rl_callback_handler_install (NULL);
+ }
+}
+
/* Displays the prompt. If the argument NEW_PROMPT is NULL, the
prompt that is displayed is the current top level prompt.
Otherwise, it displays whatever NEW_PROMPT is as a local/secondary
3. On prompting for pagination. */
void
-display_gdb_prompt (char *new_prompt)
+display_gdb_prompt (const char *new_prompt)
{
char *actual_gdb_prompt = NULL;
struct cleanup *old_chain;
the above two functions. Calling
rl_callback_handler_remove(), does the job. */
- rl_callback_handler_remove ();
+ gdb_rl_callback_handler_remove ();
do_cleanups (old_chain);
return;
}
if (async_command_editing_p)
{
- rl_callback_handler_remove ();
- rl_callback_handler_install (actual_gdb_prompt, input_handler);
+ gdb_rl_callback_handler_remove ();
+ gdb_rl_callback_handler_install (actual_gdb_prompt);
}
/* new_prompt at this point can be the top of the stack or the one
passed in. It can't be NULL. */
}
prompt_length = strlen (prefix) + strlen (prompt) + strlen (suffix);
- composed_prompt = xmalloc (prompt_length + 1);
+ composed_prompt = (char *) xmalloc (prompt_length + 1);
strcpy (composed_prompt, prefix);
strcat (composed_prompt, prompt);
{
printf_unfiltered (_("error detected on stdin\n"));
delete_file_handler (input_fd);
- discard_all_continuations ();
- discard_all_intermediate_continuations ();
/* If stdin died, we may as well kill gdb. */
quit_command ((char *) 0, stdin == instream);
}
else
- (*call_readline) (client_data);
+ {
+ do
+ {
+ call_stdin_event_handler_again_p = 0;
+ (*call_readline) (client_data);
+ } while (call_stdin_event_handler_again_p != 0);
+ }
}
/* Re-enable stdin after the end of an execution command in
static void
command_handler (char *command)
{
- int stdin_is_tty = ISATTY (stdin);
struct cleanup *stat_chain;
clear_quit_flag ();
- if (instream == stdin && stdin_is_tty)
+ if (instream == stdin)
reinitialize_more_filter ();
/* If readline returned a NULL command, it means that the connection
{
linelength = 80;
linebuffer = (char *) xmalloc (linelength);
+ linebuffer[0] = '\0';
}
p = linebuffer;
/* Add line to history if appropriate. */
if (*linebuffer && input_from_terminal_p ())
- add_history (linebuffer);
+ gdb_add_history (linebuffer);
/* Note: lines consisting solely of comments are added to the command
history. This is useful when you type a command, and then
{
if (linelength > saved_command_line_size)
{
- saved_command_line = xrealloc (saved_command_line, linelength);
+ saved_command_line
+ = (char *) xrealloc (saved_command_line, linelength);
saved_command_line_size = linelength;
}
strcpy (saved_command_line, linebuffer);
{
signal (sig, handle_sigterm);
- /* Call quit_force in a signal safe way.
- quit_force itself is not signal safe. */
- if (target_can_async_p ())
- mark_async_signal_handler (async_sigterm_token);
- else
- {
- sync_quit_force_run = 1;
- set_quit_flag ();
- }
+ sync_quit_force_run = 1;
+ set_quit_flag ();
+
+ mark_async_signal_handler (async_sigterm_token);
}
/* Do the quit. All the checks have been done by the caller. */
static void
async_disconnect (gdb_client_data arg)
{
- volatile struct gdb_exception exception;
- TRY_CATCH (exception, RETURN_MASK_ALL)
+ TRY
{
quit_cover ();
}
- if (exception.reason < 0)
+ CATCH (exception, RETURN_MASK_ALL)
{
fputs_filtered ("Could not kill the program being debugged",
gdb_stderr);
exception_print (gdb_stderr, exception);
}
+ END_CATCH
- TRY_CATCH (exception, RETURN_MASK_ALL)
+ TRY
{
pop_all_targets ();
}
+ CATCH (exception, RETURN_MASK_ALL)
+ {
+ }
+ END_CATCH
signal (SIGHUP, SIG_DFL); /*FIXME: ??????????? */
raise (SIGHUP);
gdb_stdtargerr = NULL;
#endif
- rl_callback_handler_remove ();
+ gdb_rl_callback_handler_remove ();
delete_file_handler (input_fd);
}
projects / deliverable / binutils-gdb.git / blobdiff